CliMA/Oceananigans.jl: v0.49.0

Oceananigans v0.49.0 Diff since v0.48.0 Checkpoint release including documentation fixes and very experimental support for curvilinear grids, a vertically-stretched rectilinear grid, and a preconditioned conjugate-gradient solver. Closed issues: Strategy for implementing and testing models with vertically stretched grids (#471) NetCDFOutputWriter docstring is mangled (#1275) Docstring for KernelComputedField is incorrect (#1370) Merged pull requests: Adds boundary conditions to ComputedField and KernelComputedField (#1340) (@glwagner) Vertically stretched grid (finally) (#1348) (@ali-ramadhan) Adding a first form on PCG pressure solver (#1360) (@christophernhill) VectorInvariant momentum advection "scheme" and Bickley jet validation example (#1366) (@glwagner) Adds a few areas and volumes needed for correct Coriolis terms on curvilinear grids (#1371) (@glwagner) Horizontal divergence and vertical vorticity operators (#1374) (@glwagner) HorizontalCurvilinearDiffusivity for dissipation on horizontally-curvilinear grids (#1375) (@glwagner) AbstractRectilinearGrid and curvilinear horizontal grid spacing and gradient operators (#1376) (@glwagner) Changed KernelComputedField's docstring to the user-facing dfunction (#1379) (@tomchor) Fixes formatting issues in kernel_computed_field.jl (#1382) (@glwagner) Update netcdf_output_writer.jl (#1383) (@tomchor) Correct pressure gradients for curvilinear grids in HydrostaticFreeSurfaceModel (#1385) (@glwagner) Update Documenter v0.26.2 (#1387) (@navidcy) Bump v0.49.0 (as a checkpoint) (#1388) (@ali-ramadhan) Adds instruction for building docs locally in the Contributors Guide (#1389) (@navidcy) Remove duplicate include (#1390) (@ali-ramadhan